Concrete reinforce.



W. H, BURK.

v CONCRETE RBINFORGB.

APPLICATION FILED JUNE 17,1910.

1,043,198; Patentedl Nov. 5, 1912 /fzesses:

W. H. BURK.

CONCRETE RBINPORCB.

I APPLICATION FILED JUNE 17, 1910.- Y 1,043, l 9. Patented Nov. 5, 1912.

7 SHEETS-SHEET 2.

W. H. BURK. CONCRETE RBINFORCE.

Y APPLICATION FILED JUNE 17,1910. l 1,043, 1 98, Patented Nov. 5, 1912.

7 SHEETS-SHEET 3.

y Y @Zym K W. H. BURK. CONCRETE REINPORGE. APPLIGATION FILED JUNE 17, 1910.

Patented Nov. 5, 1912.

7 SHEETS-SHEET 4.

W. H. BURK. CONCRETE RBINPORGE.

APPLICATION FILED JUNE 17, 1910. 1,043@ 98. Patented Nov. 5, 1912.

W. H. BURK. GONQRBTE REINFORGE.

l APPLICATION FILED JUNE 17, 1910. Lg 98a i Patented Nov. 5, 1912.

7 SHBETS-SHEET 6.

W. H. BURK. CONCRETE REINFORUE. APPLICATION FILED JUNI: 17, 1910.

Panted NOV. 5, 1912.

7 SHEETS-SHEET 7.

WILLIAM H. Bonner sri LOUIS, MISSOURI, Assienon .To oonaoea'rnn naze' rants cris-ion.

.. FFA

lCOMPANY, OF ST.- -LOUIS, MISSOURI, A CORPORATION F MISSOURI.

CONCRETE REIN FORCE.

speeiacnon of To vall whom 'it may concern: Be it known` that I, VVILLIAMH. BURK, a citizen of the United States, and a resident of the city of St. Louis and State of Missouri, have invented av new and useful linl provenient in Concrete Reinforces, of which the following is a specification;l In the construction of reinforced concrete. beams and\like structures, it-is the common opractice to position the' several bars or other reinforcing lnembers individually at the Worlr;.and niith unskilful Workmen and unfavorable conditions at the Work, the actual positions of the reinforcing niembersare liable to vary'fromthe positions they are designed to occupy. On the otherA hand74 if the reinforcing members are assembled .at the factory, in proper relation to each other, they are lia-ble to'be bent or to shifted 2O with relation vtoeach other beforef'reaching lthe work. -f 1.

The principal object of the present invenvtioii is to provide for the assemblingofv the reiiiforcingmeinbers into a unitaryframe vwhich will minimize the risk of lia-vin its members distorted or linintentionally s ifted in relation to .each-other during shipment. Another object is to make the dist/ance between the side members easily/ adjustable i0 and to facilitate the spacing/'of oneV unit frame from another. The invention consists in vthe construe tions and arrangements of parts hereinafter described and claimed. 35- in -the accompanying drawings which forjn part of this'speciicatiomand wherein like symbols refer to like parts Wherever they occur7 Figure l is Yside elevation' omitting some details) of a reinforcing wfreiineembodying my invention; Fig. 2 is plan view showing the unit frame in its collapsed condition; Fig. 3 is atop plan view showing the frame in its open. or nor- Amal.c m`dition`; Fig. '4 is a fragmentary top s inyieg ,on an enlarged scaleyshowing thetrame-injopen position; Fig. 5 isp trans vers'evertical section on the line 5-5 of igtv 1; i'sea detail perspective viegv fof lifspacing clip detached; Fig. 7 a frag- Mnientary top planview a collapsible unit frame having single reinforcing members@ lL`-i,; 8 is a 'ct `im'the-. l-ineS--i of Fig.

` g 'criteri-.top plan viewv Brito that shown imodiiiedform of Letters Patent. Patented Nov. 5, 1912. 1910.V ser'iaiiio. 567,347.

link and clip; Fig. 10 isl a detaii perspective l1 is a fragmentary plan view similar to Fig. 7 but showing a modified form. of link; Fig. 12 is a transverse -vertical section throught the frame vshown in Fig. 11; Fig. .13 is a plan view of the blank .in Figs. 7 and 11 is formed; Fig. 14 1s a transversel vertical 'section through a further modified construction and' arrange` ment of reinforcing frame; Fig. 15 is a section on the line 15-15 of Fig. 14; Fig. 16 is a plan view ofthe blankfrom which .the clip shown in Fig. 14 is formed Fig. 1T is a frag mentary view, partly in top plan and partly in horizontal section, showing a modification of the reinforcing frame illustrated in Figs. 1 to 6, inclusive; Fig. 18 is a transverse vertical section. through the trame spective View of the distance piece or spacing' clip shown in Figs. 17 and 1S; Fig. 2O 1s a fragmentary View, partly in top plan modiiicationof the clip and link; Fig. 21 is a transverse vertical s ection through the frame shown 1n F 1g. 20; Fig. 22 is a detail per- A1n Figs 20 and 2l; Fig. 23" is a fragmentary top plan view showing a reinforcing `traine comprising four' parallel single barsor main reinforcing members Fien 24 is a transverse vertical section` thronglitne frame shown in Fig. 23 Fig. 25 is section on the line of F ig. Qi; and F @Gis a section on the'line QV--QG of Fig.

to 5, inclusive, the main reinforcing menivbers are trained together in tivo groups each of which constitutes a side ot' acollapsible unit fraaie. ln this construction-the pri' mary reinforcing inen'ibers oi each side com prise a straight horizontal bar l at the bottom and a second bar located above it, both of which are ln'eferably corrugated to provide transverse ribs B (see Fig. Li). The middle portion Vof the second bar is parallel with the first mentioned bar but, at eaph end f of said middle portion, said second bait inclines upwardly and thence extends horit Zontally to each end, in confornVv ity with the common practice; and the ends of said second or upper bar are preterably carried some dlstance beyond the ends ot the bot view of the wire clip shown in Fig. 9; Fig.`

from which the securing clip shown shown in Fig. 17; Fig. 19 is a detail perand partly in horizontal section, showing a 1n the construction illustrated in Figs. l."

spective view of the spacing clip illustrated S5 tom bar. The two bars thus constituting the primary reinforcing members of a side of the unit4 trame are firmly held together by suitable spacing clips or distaneepiece's 4, preferably of the kind hereinafter more i'nlly described. The respective side frines constituting the primary reinforce, in practice, support groups of secondary reinforcing members or loops 5, whose principal function is to take care of the shearing stresses and diagonal tension stresses in the beam. 'lhe side trames or membersof thc complete unit 'trame are connected together by links t() ot any .suitable type thatpvill permit such side members to come together.- As' illustrated in Figs. i to (i, inclusive, the distance. pieces or spacingclips Il Which hold together the main reinforcing bars o't a Side frame or member comprise a sheet metal blank whose opposite end portions are slitted to provide tongues t3 which are bent around the respective bars l, 2,011 opposite sides ol" a rib il. Lateral extensions 7 oi' the body portion oi' the blank are turned iuwardbY between the two bars l, 2. The portion ol' the blank between the top tongues is removed and the body portion ot the blank is crimped or grooved vertically as at- 8. 'lhe portion between the. bottom tongues is retained intact with the body portion, and crimped in line `with the crimped portion S to constitute a toot, t) which is adapted to rest upon the. centering or false work, so as to support the unit i'rame in the proper -position vertically it is to occupy in the completed tloer or beam. The links- It) are each preferably made. ol.l a continuous strip ot' still'. wire bent into the t'orm of a rectangle with the end portions ot the wire overlapping at the top olf the traine as at l0 and extendingrespectively beyond the opposite ends ot'l the rectangle as at lill. The vertical sides ol the rectangular link lt) are. hinged bei weon the outer sides ol the respective bars 1 l, Z., and the crimped or `Lwooved portion S ol' the distance piece. 'l'he extensions itl" are provided tor the purpose oli properly spacingV the .several unit trames when a multiplicity ol' the same are employed in rein .Forcing` a beam or floor. lhat is, the several collapsible units are opened as they are assembled in position and the adjoining units are brought together until the ends o1? said extensions ttl" touch in the same longitudinal plane. lt is therel'oreobviousthat. thelength ot'l .said lnojcction's depends upon the desired space between the respective unit trames, and said extensions are approxiniately one-bidtl ot' the distance. Y

As .shown in ities. T and H. the collapsible. t'rame comprises ,singlebar side members l". ln this construction. the securing :flips ll are lormed l'rom a simile blank or sheet. oll metal whose end portions` are perforated and slittod tranfefersely fiom one side. 'lhe l eye ol' opposite end portions ol' the blank are folded over the top and bottoni ot the bar, respectively, and the \y eri ical sides ot' the rectangular link 10 are pivoted in the perforations 12. In order to insert the vertical sides' of the rectangular link l()U into said perforations 12, the end portions 123 of the clip 1 1 are bent or sprungI to open the. slots 14' suiiicie'ntly to permit the link to be slipped therethrough. The end portions 13 oi the. clip li are then bent vor permitted to spring back to normal position, as the case may be, after the link is/in position.

1n Figs. 9 and 10, the unitfraine is provided with a link 101 from which the end extensions 1Q are eliminated. This link l0d is pivotally mounted in a clip 15 comprising a single strip of still' wire which is bent and relient so as to tit;- over nthe respective bars la and to provide looped portions 1G in which S5 the link 10l is pivoted.

ln Figs. Lt'and 1Q, a it'ranie similar to that illustrated in Figs. 't' and S is shown, the only ditl'erenee beingthat the link i0 is substituted t'or the link 10c. v

`In Figs. lit and 'i5 a clip and distance piece 1T somewhat' similar to the, clip 1l above deseribet't, shown.; 'lhe opposito'end portions 18 of the distance piece 17 are perforated as at lil and slitted as at t2() in a manner similar to the clip ll. These end portions lt are bent over the top and bottom bars l, 2, respectirely, and have the vertical sides of the link l()c pivoted therein. 'l`he middle portion olf the distance piece i7 is extended laterally as at) 2l and it isV bent inwardly between the bars l and 2; and the inner end iortion'QQ is bent around the ad jacent vertical side otl the rectangular link l0".v

'lho construction shown in Figs. 17 to It). inclusive. is similar to that.` illustrated in Figs. l to (i, inclusive. the ditl'erenee lie-- ingr that the l'cct tl on the distance pieces and the extensions ttl" on the links are eliminated. y

.\.s shown in i\`i;s. it) tt:- 522, inclusive, the. side `trames oi the unit comprise t.\\'o meinbers which are secured together by spacing' clips or distance pieces 2li whose opposite end portions l- :ire bent around the respective bars l` L). and having an interV mediate portion 2o `which isbent inwardly between the two bars. rl`he inner end 200i' the portion Q5 is curled around the'link 10d."

ln Figs. and il. a collapsible nuit l'rame comprising; t'our parallel single bars or members is illustrated. ln this constritw tion. the bars lI are securirl on distance pieces or supports LET. Q8., The distance pieces .IT. 2S arteach 't'ormed of a single 125 blank whose middle portion is relient'. and folded upon itscll' to provide vertical c ves or loops 2S). the oni)1 dillercuce being that tlietlishance pieces are made with a single loop, while the niemhers' are made "30 doable; lll-.lt is, they are provided with two vertical eyes or loops. These distanee pieces E?, QS are `notched to proride seatst'or the bars l and have tongue portions -OvWhiell are llellt over thc tops ot the bars to hold the same in place. These distance pieces and hinge members 2T, 2S serre to space the nlain reinforcing barsA troni the centering or false work ill tile manner similar to the feet il hereinbet'orc referred to. i

VIt' is noted that by reason ot' tllc parallel members or side trllnles being` linked togriller, the construction may be collapsed lor sllilnncnt. in Which Condition it is less illllky and less liable to injury. So. too, it is noted that it the centering should accidentally be made narrower than designed, the pi'l'otally mounted links will permit the side i'rallles to he disi'llaced longitudinally, tllns derreasing the spaces between the side frames without atiecting the parallel relation ot the side t'ralncs. Furthermore, the Construction and arrangement of the. links ol'lers little or no obstruction to the flow of tile concrete.

ll'llilc til;x foregoing description relates to ullit trames having;` either single or double side members. it is obvious that ktile inrcntion may lll" nlllodied ill a llllit trame llavin;lr any llnlnllcr ot parallel. trallles or side members. 54o. too. it is obvious that it is not necessary lllat thel parallel iranlcs or lnen'lber .should be Veounterilarts o'fcacll other. For instanclulthe middle nlenlller oi tile collapsible unil may be a single ba and the side members may be single bars, or two or more bars. without departing;l t'roul my invention.

lllhat l' elailll is:

l. A concrete reinforce comprising parallel reiniorclng bars and rigid parallel links collapsillly connecting' said bars 'to` ,griller` said links comprisinga rectangular loops o-r metal the oppositely disposed ends of ll'llicll are extended io project beyond the planes oi' the liars when said bars are spread apart, alld means t'or pivotaily mountingr said links on said bars. I

v2. A collapsible reinforcing llnit frame connniai,an` parallel side irall'les and rigid links pirotally conllerting' said side frames.

together, said links being longer than the distance between said, side trames when spaced apart and pivoted intermediate their ends to said side trames to extend beyond the outer sides ot' the resl'lective side frames when the unit trame is opened, and to lie diagonally across said sidetranlcs when the trame is in rinsed position.

3. A colla sible reinforcillfl' unit trame comprising' parallel reinforcing.Tf members, rigid links Connecting said parallel reillt'orcinpg members. the opposite end portions of said links bell-lg' arranged and adapted to extend beyond tile ollter sides ot' said pan allel reinforing members when the i'rallle is opened, and means for pivotally securing; said links to said lnelnbers and positioning said unit frame Verticallyfin thefconcretr, structure.

l. A' collapsible reinforcing unit :traine comprising arallel vertical side iframes which are pivotally connected together by rigid links, said side frames comprising reintox-cling bars and'spaeng clips arrangelfl and adapted to hold them in proper relation to eachother, said spacing clips being pirotally connected to said links and having downward extensions arranged and adapted to snpport the unit frame in its position vertically in the Concrete structure.

y 5. A collapsible reinforcing unit frame comprising parallel reinforcing lllelnllers, clips lsecured to said reinforcing n'lelnlers., and rigid links comprising reetllnglllar wire frames which are plvoted at their opposite ends to said clips, said links'comprising a single strip ot' wire Whose opposite end portions are extended so'as to project laterally beyond the out-er sides of said reinioreillgV lllembers when the unit frame is opened.

(l. A collapsible reinforcing unit traino comprising,r parallel vertical side frames, said side frames com rising reinforcing hars and spacing clips or holding said reintorcing bars in proper relation to each Elfi otller,.said .spacing clips eaoh clll'l'lprising a.4

sheet metal blank whose opposite end portions are folded around the adjacent rein- 'forcing bars and havingr intermediate portions projecting inwardly between the bars. and tile body portion of said blank being; ,(rooved vertically, and rigid links compris` ing rectangular Wire frames Whose vertical sides are pil'otally tted between the outer .sides ot' the adjacent. bars and the vertically groored portion of the adjacent; clip.

T. A collapsible reinforcing unit traine ,colll'prising parallel vertical side trames, sa ld :side lralnes eolllprxslng reinforcing hars and spacing Clips arranged and adapted to hold said bars in proper relation to each other. said spacing clips oon-lprising` a .allee-l: metal blank Whose opposite, end, portions are bent around the respective bars and har ing an intermediate .portion extending in` "lvardly between said bars, said blank having` a vertical outwardly crimped portion and. a. downward extension, adapted to support said unitralne, and' rigid parallel links pir otally connecting said side franles together and ada ted to hold them in open position, said lin rs comprising rectangular frames whose vertical lsides are pivotally tilted' iletween the outer sides ot the adjacent reinforcing bars and said vertically crimped portion in ille adjarcnt spacing clips.

8. collapsible reinforcing unit trani@ comprising' parallel vertical side frames. .said lside iralnes comprising reinforcingT bars and spacing clips arranged and adaptedftof; hold said bars in proper relation to each other, said spacingclips comprising a sheet metal blank Whoseopposite end portions are bent around the respective bars and having an intermediate portion extending inwardly between said bars, said blank having a vertical outwardly crimped portion and a downward extension adapted to support said unit frame, and rigid parallel links pivotally connecting said side frames together and adapted to hold them in open position, said links each comprising one piece rectangular Wire fran'ies Whose verti- Acal sides are ivotally fitted between the outer sides oi) the adjacent reinforcing frame and the vertifal crimped portion in the adjacent vspacing clip and the opposite ends of the wire comprising said rectangular link being extended so as to project beyond the outer sidesfof the respective side frames when the unit'if'rame is opened.

Signed atfSt. Louis, Missouri, this 14th day of June, 1910.

WVILLIAM H. BURK.

Witnesses:

A. E. LINDAN, G. A. PENNINGTON. 

